Hello Ashish

No need to worry.

You will definitely get seat in iit Guwahati ECE branch .

The cutoff for last year is 520 for sc category

You have to wait till 5 th round of josaa counselling.

Anyway congrats you will get desired branch

Also there is no spot round in IITs just to inform everyone . Special rounds are for nits and IIITs only .

Dear Ashish

For your rank of 480 and category is SC , you have a chance to get IIT Guwahati. But you cant get it in the first or second round of counselling.  As candidates with higher rank than you have occupied the seats but few candidates leave their seats for better seats. So you can have a chance to have seat during the 4th round of counselling or spot round counselling.  So keep checking the official website for real time information.  I hope it helped